Fig. 1. Net radiation, latent heat (LE), and sensible heat (H) fluxes simulated (lines) and measured (symbols) over sorghum during day of year 247 to 251 (4–8 September) 1999 in the (a) control wet, (b) free air CO₂ enrichment (FACE) wet, (c) control dry, and (d) FACE dry treatments. Downward fluxes (influxes) are positive, and upward fluxes (effluxes) are negative. For irrigation schedules, see Table 1.